Malicious PDF — malware analysis report

Static analysis result for SHA-256 deca08ef264db1e3…

MALICIOUS

PDF

74.9 KB Created: 2021-07-16 08:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d3852cbc4ec57beb01a1b69c6cb42426 SHA-1: 884ac9999b95fada7a4c902ade5f0665efbd3693 SHA-256: deca08ef264db1e3fd1e26efa9a340d1687aab78c8d40356a2857e5688488a10
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is flagged as potentially malicious, suggesting a phishing or credential harvesting attempt. No scripts were extracted, but the presence of embedded URLs points towards a social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://feedproxy.google.com/~r/sq/ugae/~3/uzX87CUNjRg/square?utm_term=chartered+accountant+website
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee58fc6d75c50a5d45a9a2/1626233084965/dedexiv.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edff20537dfa2004081a07/1626210080466/superhero_some_fairy_tales_song.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0ffb23710375a26a5b106/1626406834846/caribbean_airlines_flights_from_barbados_to_jamaica.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7f90c85664d35b0e8b9c8/1625815308798/combined_gas_law_constant.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f10c5c311eab0d81aacfca/1626410076714/jamiboz.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0f34bf32be22f00741cd6/1626403659667/xojonikogerudojixek.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee7a082a4cda17626179d8/1626241544213/kathleen_collins_fiddle.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c40c.bin
1de9a421e01ca86194ee4b96dfac44f40ca3772e8b67b6184e0b54d54b523ee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC40C 10776 bytes
font_01_sfnt_off0000dcdf.bin
59a757e00d443fba6bdf605e5b0863bc94cb90775c3a9b4f289161b054f0b115		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDF 16496 bytes
font_02_sfnt_off0001079d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1079D 16792 bytes

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